Events and trends

• 1627 BC—Beginning of a period of cooling of the world climate lasting several years, recorded in tree-rings all over the world. It might have been caused by the Minoan eruption of Thera
  Santorini
  Santorini , officially Thira , is an island located in the southern Aegean Sea, about southeast from Greece's mainland. It is the largest island of a small, circular archipelago which bears the same name and is the remnant of a volcanic caldera...
  
   which according to the Parian Chronicle
  Parian Chronicle
  The Parian Marble or Parian Chronicle is a Greek chronological table, covering the years from 1581 BC to 264 BC, inscribed on a stele...
  
   occurred in 1627, or the Avellino eruption
  Avellino eruption
  The Avellino eruption of Mount Vesuvius refers to a Plinian-type eruption that occurred in the 2nd millennium BC and is estimated to have had a VEI of 6...
  
   of Mount Vesuvius
  Mount Vesuvius
  Mount Vesuvius is a stratovolcano in the Gulf of Naples, Italy, about east of Naples and a short distance from the shore. It is the only volcano on the European mainland to have erupted within the last hundred years, although it is not currently erupting...
  
  .
• 1625 BC—Samsu-Ditana
  Samsu-Ditana
  Samsu-Ditana was the King of Babylon, who reigned from 1626 BC to 1595 BC.Samsu-Ditana is the last king of the First Babylonian Dynasty. After the Hittite army under Mursilis I invaded Babylon, he was overthrown....
  
   becomes King of Babylon
  Babylon
  Babylon was an Akkadian city-state of ancient Mesopotamia, the remains of which are found in present-day Al Hillah, Babil Province, Iraq, about 85 kilometers south of Baghdad...
  
   (middle chronology).
• 1621 BC—Lullaia becomes the King of Assyria.
• 1620 BC—Mursili I
  Mursili I
  Mursili I was a king of the Hittites ca. 1556–1526 BC , and was likely a grandson of his predecessor, Hattusili I. His sister was Harapšili.- Biography :...
  
   becomes King of the Hittite Empire (middle chronology).